From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Thu,  4 Nov 2004 14:51:48 -0500
From: Russ Cox <russcox@gmail.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@cse.psu.edu>
Subject: Re: [9fans] pipewrite hi 80107fd4
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> This is on Xen/Plan 9.
> 
> I'm still seeing these, even though I keep thinking I've fixed it.
> 
> Any comments on what to look for are welcome :-)

you're running spl hi when you shouldn't be.
the problem is likely nowhere near the pipe code.
look for code fiddling with spl that you have changed
recently.

russ